Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Arthroplasty - Hip
Abstract number: 24592
ACETABULAR RECONSTRUCTION USING REINFORCEMENT RING AND
CEMENTED METAL ON METAL CUP FOR REVISION HIP ARTHROPLASTY
Inder GILL, Murali KRISHNAN, Mike REED, Paul PARTINGTON
Wansbeck General Hospital, Newcastle Upon Tyne (UNITED KINGDOM)
Aim: To report the short to medium term results of acetabular reconstruction using
reinforcement/reconstruction ring and cemented metal on metal cup. Methods: Single
centre retrospective study of 6 consecutive patients. The acetabulum was
reconstructed using morcellised femoral head allograft and reinforcement or
reconstruction ring fixed with screws. The Birmingham cup designed for cementless
fixation, was cemented into the ring. Uncemented stem with metal on metal modular
head was used for reconstructing the femur. Our previous in-vitro study has shown
good pull out strength of a cemented Birmingham cup.Results: There were 2 men
and 4 women with a mean age of 75 years (57-83). Revision was performed for
aseptic loosening in 2, septic loosening in 2 and peri-prosthetic fracture with
loosening in 2 patients. All patients were reviewed at a mean of 36 months (24 - 42
months). Revision was not necessary in any patient for failure of acetabular or
femoral fixation. 1 patient had revision for recurrent infection and osteomyelitis at 24
months, excluded from final analysis. The mean Harris hip score at follow up was
79(range 70-89).Radiographs revealed good graft incorporation and no signs of
loosening or cup/ring migration.No dislocations or metal ion problems were recorded.
Conclusions: We believe this is the first series using cemented metal on metal cups
within a reinforcement/reconstruction ring for revision hip arthroplasty. Excellent
cemented fixation of the cup, manufactured for cementless fixation, was obtained
with no evidence of loosening or dislocations at minimum 24months follow up.
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